Means for boring or reaming.



P. A. DE LEUN. MEANS FR BORING 0R REAMING.

APPLICATION man SEPT. 25. 191e.

3 SHEETS-SHEET l.

1mm@ Apr. 30,1918.

3 SHEETSv-SHEET 2.

, P, A. DE LEON. MEANS FOR BORING OR'REAIVIING. APPLICATION-FILEDSEPT.25. IASI.

-Eatented Apr. 30,. 19M.

' 3 SHEETS-SHEET 3.

PAUL A. DE LEON, OE BAYONNE, NEW JERSEY, ASSIGNOR TO THE CLOTHELCOMPANY, Y 0F NEW YORK, N. Y., A CORPORATION OF NEW YORK.

MEANS EOE. BORING- OR REAIVIING'.

Specification of Letters Patent.

Patented dpr,I 3011, 1919.

To all whom t may concern:

Be it known that I, PAUL A. En LEON, a citizen of the United States, andresident of Bayonne, in the county of Hudson and State of New Jersey,have :invented certain new and useful Improvements in Means for Boringor Reaming, of which the following is a specification.,

,This invention relates to new and useful improvements in means forboring or. reaming to produce a bore or chamber of irregular contour.The invention will be found useful in various arts, but especially inthe formation of substantially elliptical piston chambers for rotarypiston pumps, compressors, engines and similar devices employing rotarypistons each turning on an axis eccentric to its chamber and providedwith sliding radial piston blades which coperate with a wall of thechamber.

'llhe invention consists "in the improvements to be hereinafter morefully described.

rlFhe embodiment of the invention illustrated in t'he drawings isadapted to ream the inner face of a true cylinder in such a manner thatwhen a rotor is eccentrically journaled in the cylinder a line extendingthrough the center of the rotor and touching the casing at oppositepoints will be of the same predetermined length wherever drawn.

In the drawings Figure 1 is a top plan view, partly in section,illustrating a compressor casing held in position for reaming; thereaming means being shown in working position within the casing;

Eig. 2 is a sectional view on the line 2 2 of Fig. 1;

Fig. 3 isa sectional View ontheline 3-3 of Fig. 2; f

Fig. 4 is a plan view, partly in section, of the reaining means; t

Fig. 5 is an elevation of the device shown in Fig. 4; and

Eig. 6 is a diagrammatic view illustrating the action of the inventionin the facing of a rotor cylinder.

Referring to the drawings, 2, designates a work support constructed tohold t'he element to be subjected to the action of my invention andwhich may also, if desired, serve as a bearing support for the boring orreaming means. This support 2 may be constructed in a variety of wayswithout departing from my invention. It may, for instance, consist of atable or platform supported upon suitable legs 3 and formed with aperipheral vertical flange 4 providing a seat 5 -to receive the endflange of the work. The Work support is also provided with verticalabutnients or rests 6, against which the wall ofthe work casing ispermitted to abut, whereby the work is held against rotative movementwhen being operated upon.

Carried by or forming a part of the work support just described is abearing support which may consist of connected arms 7 formed with acentral aperture to receive a vertically disposed bearing 8, whichbearing is so located as to be eccentric of the internal bore of thework when the latter is supported in position on the work support.

rlhe boring or reaming means comprises a cylindrical bar 9 adapted toturn in bearing 8 and being journaled slidably through the latter; saidbar carrying a head 10, from which rises a shank 11 adapted to beengaged by the mandrel of a drill press or other rotary means wherebythe said shank 11, head 10 and bar 9 may be rotated.

The head 10 is formed with a transverse opening 11X the centrallongitudinal axis of which extends at right angles to the longitudinalaxes of the head 10 and the bar 9. The opening 11X is preferablycylindrical in cross section and contains a split bearing sleevecomprising the parts 12, 13, one of which, 12, is 'held in place againstturning and also lengthwise movement by key pins v 14, seated '1n alinedopenings formed in the wall of head 10 and the said bearing sleeve part.The other part 13 of the split sleeve is heldin place by set screws 17extending through the side wall of the head l() within recesses 18formed in said part 13. Lock nuts 19 may be provided on the set screws17 to hold them in adjusted position. Reciprocable through the bearingprovided by the parts 12, 13 is a tool carrier 20, preferably in theform of a cylindrical bar, one end of the bar being provided with a slotor recess 21 to receive a cutting tool 22, which may be held in positionin said slot by a set screw 23. This cutting tool is set to extend atright angles across the internal cylindrical face of the work and inorder that'it may be so held and the bar 20 prevented from turning, saidbar is keyed to the bearing part 12 by key 24.

0n its end opposite that carrying the cutting tool, the bar is providedwith a follower constructed and arranged as follows: On the end ofthebar is a head or enlargement 27, formed with a socket 28 (Fig. 3) inwhich is slidably held a block 29, said block being held againstrotation by ns or webs 30 on the opposite sides thereof and slidablyfitted within grooves 31, formed in the opposite walls of the chamber28. 1n order to adjust and hold the block 29 at the proper point, lprovide an adjusting and holding screw 32, threaded at one end in athreaded aperture 33 formed in the block and having its opposite endrotatively seated in a bearing recess 34C in the bottom of the socket28. rlhe screw 32 is provided with an intermediate recessed flange 35adapted to be engaged by a pin wrench (not shown) and to be rotatedthereby to eniect the desired adjustment of the block, the wall orsocket 28 being cut away for such purpose, as shown in Fig. 1. Theflange 35 may be engaged by any suitable locking means to hold the screwagainst accidental rotation, for instance the said flange may beprovided with recesses adapted to be engaged by a spring pawl 35a, asindicated in dotted lines in Fig. 2.

The outer end of block 29 is provided with a semi-cylindrical groove orrecess 38 to receive a wear piece or contact piece 39 having asubstantially flat outer piece adapted to contact with the internalcylindrical face of the work. This contact piece is held againstmovement lengthwise of. itself by means of keeper plates 40, secured byscrews 41 to the upper and lower faces of the block 29, as shown inFigs. 1 and 2 of the drawings.

Fig. 6 diagrammatically illustrates the action of the present embodimentof the invention in facing the cylindrical bore of a rotor casing sothat the latter is made quasi-elliptical. In said ligure a indicates thelongitudinal axis of the casing bore, whilea7 illustrates the offsetposition of the mandrel axis, which, when the facing is completed,becomes the axis of the rotor. For purposes of illustration the cylinderhas been divided by two Sector lines c and 0*. Now when the mandrel isturned so that the longitudinal axis ofthe carrier lies in the sectorline cx, the carrier is movable across the axis of the cylinder. lt isin this position that the follower 29 is adjusted for the first cut, itbeing manifest that whenever the axis of the rotor is to besubstantially offset from the axis of the casing the thickness of themetal to be cut away from the cylindrical casing makes it necessary oradvisable to eect the facing by a plurality of cuts. Assuming that inthe position indicated, the blade and follower both contact with thewall of the casing, the' follower Vis moved inwardly a distanceproportionate to thedesired depth of the first cut, and the mandrel isthen rotated and fed axially to carry the tool through the work, theresulting cut being indicated at e in Fig. 6. In the facing operationillustrated in the ligure three successive cuts are made. Nowpreliminary to the second cut, the follower is moved forwardly adistance equal to the desired cut at its maximum depth point; the secondcut being indicated at on Fig. G. Preliminary to the third and finalcut, the mandrel is turned until the longitudinal axis of the carrier 2Olies in the sector line cx, and then the follower is adjusted forwardlyuntil both the tool and the follower Contact with the wall of thecasing. After the formation of the third cut g lines drawn in anydirection through the mandrel axis and touching at their ends the casingwall, will be of equal length.

To insure that the tool will be held out of contact with the casing wallwhen the carrier turns out of normal cutting position a spring, orsprings, such as l2 may be arranged to act continuously on the carrier20 in such manner as to move cutting tool 22 rearwardly and away fromthe casing wall. In the present embodiment of the invention each springis fitted in a socket 43 formed in the mandrel head 10 the stress of thespring acting upon a contact stud 114i tapped into the wall 27 of thecarrier: To hold the spring in position throughout the reciprocation ofthe carrier a guide pin l5 is secured at one end to each contact stud laand extends through the socket and an aperture in the bottom wall of thelatter.

It is manifest that various changes and modifications may be made in theembodiment herein described and illustrated without departing from thespirit of the invention, and therefore l do not limit myself to saidembodiment except in so far as required by the scope of the claims, butwhat ll claim is as follows:

1. In means for boring or reaming the combination with a work support ofa rotary mandrel formed with a transverse aperture, a tool carriersupported in said aperture and free for endwise movement therein, a toolcarried by said carrier at one end thereof and a non-cutting contactmember at the opposite end of said carrier.

2. In means for boring or roaming, the combination with a rotarymandrel, of a work support adapted to hold a casing to be operated upon,means for supporting the mandrel eccentrically of the longitudinal axisof the casing bore, a tool carrier held for endwise movement upon themandrel, a tool held at the end of the carrier, and a follower held atthe opposite end of the carrier.

3. In means for boring or reaming, the combination with a rotarymandrel, of a work support adapted to hold a casing to be operated upon,means for supporting the mandrel eccentrically of the longitudinal axisof the casing bore, a tool carrier held for endwise movement upon themandrel, a tool held at the end of the carrier, and a follower held atthe opposite end of the carrier, said follower being adjustable toincrease the effective length of the tool carrier.

4L. In means for boring or reaming, in`

combination, a work support formed with a bearing aperture, a mandreljournaled in said bearing aperture, seats on the work support adapted tohold a casing with its longitudinal axis eccentrieally disposed withrespect to the longitudinal axis of the mandrel, a tool carriersupported upon the mandrel for reciprocation transversely thereof, afollower at one end of the carrier, and a tool at the opposite end ofthe carrier.

5. ln means for boring or reaming, in combination, a mandrel, a cuttingtool supported upon the mandrel and free for move ment transversely ofthe longitudinal axis of the latter, and a spring engaging the cuttingtool and tending to press the same rearwardly while permitting a reversemovement thereof.

6. In combination, a work support for supporting an annular body, amember rotatable on an axis eccentric to that of said body, a cutter barcarried by said member and slidable transversely thereof, said barcarrying at one end a cutter and at the other end a follower torespectively contact the interior face of said annular body.

n testimony whereof I have hereunto signed my name in the presence oftwo subscribing witnesses.

PAUL A. DE LEON.

Witnesses:

PAUL H. FRANKE, EDWARD R. MEYER.

@oplet of thm patent may te obtained for ve vente each, by addressingthe commissioner of @atenta Washington, D. G.

